Two men, not specified which group of rebels, ride a motorcycle towards an abandoned UN base at Syria's Quneitra border crossing between Syria and the Israeli-controlled Golan Heights, Nov. 28, 2016Ariel Schalit / AP

The Assad regime, which has gained the upper hand in the war, is now focusing on aggressively attacking rebel enclaves east of Damascus and in the northern Idlib province. But it is also gradually bolstering its presence in southern Syria, including in the Syrian Golan Heights. And accordingly, Israel is altering its deployment to prepare for what’s to come.

The de-escalation agreement for southern Syria, which the United States, Russia and Jordan signed last November, included a promise to keep Iran and its affiliated Shi’ite militias away from the Israeli border. Israel wanted the Iranians and their agents to be kept almost 60 kilometers from the frontier, east of the Damascus-Daraa road. But it didn’t get its wish; the agreement committed to keep them only 5 kilometers from the front lines between the regime and the rebels.

What this means in practice is that the Iranians are allowed to come to within 20 kilometers of Israel’s border in the central Syrian Golan and within just 5 kilometers in the northern Syrian Golan, which is controlled by Assad’s army. But it’s safe to assume that Hezbollah operatives and even members of the Iranian Revolutionary Guards sometimes come right up to the border.

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The Assad regime has posts overlooking the Israeli border near Quneitra in the northern Golan, and it’s possible that senior Hezbollah operatives and Iranian representatives visit these posts, which are quite close to Israeli territory.

That isn’t the only important development in recent months. About a month ago, the regime retook the enclave of Beit Jin in the northern Golan from Sunni rebels; it’s located less than 15 kilometers from the Israeli border. Israel Defense Forces officers believe that sooner or later, Assad will make an effort to regain control of the rest of the Syrian Golan, in part because of the symbolic importance of sovereignty over the border with Israel. Members of the security cabinet, who toured the Golan with senior IDF officers almost two weeks ago, think the same.

FILE PHOTO: Iran's army chief of staff Maj. Gen. Mohammad Bagheri, left, looking at a map with senior officers from the Iranian military as they visit a front line in the northern province of Aleppo, Uncredited/AP

Analyst Elizabeth Tsurkov, who has followed events in Syria closely for the last several years and has interviewed many rebel militiamen and residents of the Syrian Golan, published a detailed survey of developments in southern Syria in the War on the Rocks blog last week.

Tsurkov said the scope of Israel’s involvement in southern Syria has changed in recent months in response to the regime’s successes in the civil war and Iran’s consolidation in Syria. Prime Minister Benjamin Netanyahu warns about the latter on every possible occasion and has repeatedly said Israel will work to thwart it.

According to foreign media reports, over the past few months Israel has begun carrying out airstrikes against Syrian army facilities and targets linked to Iran and its Shi’ite militias, in addition to its longstanding targeting of convoys carrying arms to Hezbollah. Tsurkov also reported on other developments taking place.

Dozens of rebels who spoke with Tsurkov described a significant change in the amount of aid they receive from Israel. Moreover, she said at least seven Sunni rebel organizations in the Syrian Golan are now getting arms and ammunition from Israel, along with money to buy additional armaments.

This change has taken place at a time when America has greatly reduced its involvement in southern Syria. In January, the Trump administration closed the operations center the CIA ran in Amman, the Jordanian capital, which coordinated aid to rebel organizations in southern Syria. As a result, tens of thousands of rebels who received regular economic support from the U.S. have been bereft of this support.

At the same time, Israel has also increased its civilian aid to villages controlled by the rebels, including supplying medicine, food and clothing. Last summer, Israel admitted for the first time that it provides civilian aid to villages in the Syrian Golan, but declined to confirm claims that it also provides military aid.

Tsurkov said these Israeli moves are intended to help block the Assad regime’s advance in the Golan and its conquest of rebel-held villages near the Israeli border. Nevertheless, she wrote, there’s an expectations gap between the two sides. The rebels expect unlimited Israeli support, and some are even hoping for help in their efforts to topple the regime. Israel’s plans are much more modest, and are intended as a holding action.

Relatively moderate Sunni rebels, whom the Israeli defense establishment terms “the locals,” control most of the Syrian-Israeli border, aside from two areas – a regime-controlled area in the northern Golan and a section of the southern Golan controlled by a branch of the Islamic State, Jaysh Khalid ibn al-Walid. According to Tsurkov, Israel is also helping the rebels in their war against the Islamic State.

There have been skirmishes between ISIS and other rebel organizations over the last several years, but these battles have produced no significant change in the forces’ deployment. However, rebels told Tsurkov that Israel has recently begun helping them by launching drone strikes and antitank missiles at Islamic State positions during these battles.

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